A set of human bones is found near a reservoir for the fourth consecutive time. The only way to identify the dead person is to recover the original face based on the skull by using forensic medicine techniques. Meanwhile, Hyeonmin (played by Sin Hyeonjun), an expert in this field who is working for Department of Forensic Medicine at the state-run National Institute of Scientific Investigation, tenders his resignation in order to devote himself to taking care of her dying daughter who needs a heart transplant to live. One day, Seonyeong (played by Song Yuna), a staff at the same institute, visits his house carrying the skull of the fourth victim. Although he refuses to recover the face of the bone, she disappears leaving the skeleton in his house. From that time one, Hyeonjun is tormented by nightmares and auditory hallucinations daily. Hyeonjun discovers, as time goes by, that the serial murder is closely related to the heart transplant for his dear daughter. He decides to recover the face of the bone and again is startled to find its identity. Heart is a key word for this mystery horror movie directed by Yu Sanggon, a well-known director of independent films. This movie marks the first feature film by Yu..